c# winform 截图网页

原理：通过winform程序内置的WebBrowser 打开网页，打开成功后，通过Drawing调整保存图片。

 1 //winform加载事件
 2 private void Form_Load(object sender, EventArgs e)
 3 {    
 4     //接收web url
 5     string colle = string.Empty;
 6     string url = string.Empty;
 7     //获取进程调用传入的命令
 8     string[] args = Environment.GetCommandLineArgs();
 9     //string[] args = new string[] { @"E:\MicroSpace\MicroSpace\localpage\Debug\GetCutImage.exe", "-u:http://sliefj.com/template/amo.html","-n:E:\\TEST\\test.jpg" };
10     
11     //获取参数
12     for (int i = 1; i < args.Length; i++)
13     {
14         switch (args[i].Substring(0, 3))
15         {
16             case "-u:":
17                 url = args[i].Substring(3);
18                 break;
19             case "-n:":
20                 imagename = args[i].Substring(3);
21                 break;
22             default:                        
23                 colle = args[i];
24                 break;
25         }
26     }            
27     WebBrowser webBrowser = new WebBrowser();  // 创建一个WebBrowser
28     webBrowser.ScrollBarsEnabled = false;  // 隐藏滚动条
29     webBrowser.Navigate(url);  // 打开网页
30     webBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser_DocumentCompleted);  // 增加网页加载完成事件处理函数
31 }

 1 //webBrowser 页面加载完成后，保存图片        
 2 private void webBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
 3 {
 4     WebBrowser webBrowser = (WebBrowser)sender;   
 5     // 网页加载完毕才保存
 6     if (webBrowser.ReadyState == WebBrowserReadyState.Complete)
 7     {
 8         bool save_suc = true;
 9         try
10         {
11             // 获取网页高度和宽度,也可以自己设置
12             int height = webBrowser.Document.Body.ScrollRectangle.Height;
13             int width = webBrowser.Document.Body.ScrollRectangle.Width;
14 
15             //截图宽度、高度
16             int imgwidth = width - 2 * 60;
17             int imgheight = height - 48;
18 
19             // 调节webBrowser的高度和宽度
20             webBrowser.Height = height;
21             webBrowser.Width = width;
22 
23             Bitmap bitmap = new Bitmap(width, height);  // 创建高度和宽度与网页相同的图片
24             Rectangle rectangle = new Rectangle(0, 0, width, height);  // 绘图区域
25             //Rectangle mm=new Rectangle(
26             webBrowser.DrawToBitmap(bitmap, rectangle);  // 绘制浏览器图片至bitmap
27 
28             int bmpw = bitmap.Width;
29             int bmph = bitmap.Height;
30 
31             System.Drawing.Image Imag = new System.Drawing.Bitmap(imgwidth, imgheight);//创建Image
32             System.Drawing.Graphics gp = System.Drawing.Graphics.FromImage(Imag);//获取Image的Graphics
33 
34             //通过Graphics绘图实现截图效果
35             gp.DrawImage(bitmap,new Rectangle(0,0,imgwidth,imgheight),new Rectangle(60,48,imgwidth,imgheight),GraphicsUnit.Pixel);
36             //保存
37             Imag.Save(imagename, System.Drawing.Imaging.ImageFormat.Jpeg);
38             //bitmap.Save(imagename, System.Drawing.Imaging.ImageFormat.Jpeg);
39             bitmap.Dispose();
40             gp.Dispose();
41             Imag.Dispose();
42         }
43         catch (Exception ex)               
44         {         
45            
46         }
47         finally
48         {
49                                
50             this.Dispose(true);
51             System.Diagnostics.Process.GetCurrentProcess().Kill();
52             this.Close();
53             Application.Exit();
54         }
55     }
56 }

1 //图片保存方式
2 //imagename 图片路径
3 bitmap.Save(imagename, System.Drawing.Imaging.ImageFormat.Jpeg);
4 Image.Save(imagename, System.Drawing.Imaging.ImageFormat.Jpeg);

c# winform 截图 网页

c# winform 截图网页